text: // This file is part of Moodle - http://moodle.org/
  //
  // Moodle is free software: you can redistribute it and/or modify
  // it under the terms of the GNU General Public License as published by
  // the Free Software Foundation, either version 3 of the License, or
  // (at your option) any later version.
  //
  // Moodle is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU General Public License for more details.
  //
  // You should have received a copy of the GNU General Public License
  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  
  /**
   * Datasource for the core_user/unified_filter.
   * @deprecated since Moodle 3.9 MDL-68612 - user unified filter replaced by participants filter.
   *
   * This module is compatible with core/form-autocomplete.
   *
   * @copyright  2017 Jun Pataleta
   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
   */
  
  define(['jquery', 'core/ajax', 'core/notification'], function($, Ajax, Notification) {
  
      return /** @alias module:core_user/unified_filter_datasource */ {
          /**
           * List filter options.
           *
           * @param {String} selector The select element selector.
           * @param {String} query The query string.
           * @return {Promise}
           */
          list: function(selector, query) {
              var filteredOptions = [];
  
              var el = $(selector);
              var originalOptions = $(selector).data('originaloptionsjson');
              var selectedFilters = el.val();
              $.each(originalOptions, function(index, option) {
                  // Skip option if it does not contain the query string.
                  if (query.trim() !== '' && option.label.toLocaleLowerCase().indexOf(query.toLocaleLowerCase()) === -1) {
                      return true;
                  }
                  // Skip filters that have already been selected.
                  if ($.inArray(option.value, selectedFilters) > -1) {
                      return true;
                  }
  
                  filteredOptions.push(option);
                  return true;
              });
  
              var deferred = new $.Deferred();
              deferred.resolve(filteredOptions);
  
              return deferred.promise();
          },
  
          /**
           * Process the results for auto complete elements.
           *
           * @param {String} selector The selector of the auto complete element.
           * @param {Array} results An array or results.
           * @return {Array} New array of results.
           */
          processResults: function(selector, results) {
              var options = [];
              $.each(results, function(index, data) {
                  options.push({
                      value: data.value,
                      label: data.label
                  });
              });
              return options;
          },
  
          /**
           * Source of data for Ajax element.
           *
           * @param {String} selector The selector of the auto complete element.
           * @param {String} query The query string.
           * @param {Function} callback A callback function receiving an array of results.
           */
          /* eslint-disable promise/no-callback-in-promise */
          transport: function(selector, query, callback) {
              this.list(selector, query).then(callback).catch(Notification.exception);
          }
      };
  
  });
  